bitcoin.stackexchange.com Archives - 12 January 2013, Saturday

Investing in expensive mining equipment hedges a bet that the return on investment, in the form of Bitcoin, will eventually pay off the initial investment and continue paying a return for some time before becoming obsolete (like CPU mining has and GPU mining shortly will) or breaking ...

With the rumors of the Bitinstant credit card failing to deliver, and the only other one out there being a fake scam site, does anyone out there offer a solution to this? Just the ability to pay with Bitcoin wherever credit cards are accepted in USD is all I need.

Decentralized escrow functionality built into Bitcoin? Is there data on the geographic distribution of bitcoin users? How can the alert system be triggered? Who can do it? Who controls the Bitcoin software? Who controls Solidcoin's special millionaire accounts? When and who coined the...

No. A transaction is composed of a sequence of inputs and outputs in a specific order. This data structure is hashed and makes its way to the Merkle root and block header, and thus if the transaction were to change, all the blocks that follow would be invalidated. It's possible that a...

What are the logical conditions that would require me to change a sequence number? Suppose there is this transaction txid: abcdefghi... sequence:1 input:1someVanityName output:1otherVanityName ... ... and the people who mutually created this TX decide to revise some information. Perha...

What are the specific parts of a transaction(s) that need to be signed in the "inheritance scripting sample ". Specifically, can someone provide more detail on what exactly is signed of the transactions? I'm assuming there are approximately 3 transactions, but unsure of what is signed...

my question is about the difference between compressed keys and addresses, and i know it was addressed in another question but my question is less about the theory and more about how the keys are used practically in bitcoin. so heres what i did: i used dumpprivkey for an address (183T...

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Well after getting a new graphics card (7770) I can mine bitcoins at around 180-120Mhash/s Depending if I run it at full power or not. Now I thought I would try and mine myself an address using it but the miner just seems to not work. Using Vanitygen (Linked below) oclvanitygen I set ...

If service1 trusts service0's green address implicitly, it can send the coins immediately; there is no advantage to waiting. The recipient can then decides how many blocks to wait for before treating the payment as confirmed. If service0's green address isn't trusted, service1 needs t...

There are many causes for inflation, but the two most often agreed upon, according to Investopedia , are these: Demand-Pull Inflation - This theory can be summarized as "too much money chasing too few goods". In other words, if demand is growing faster than supply, prices will increas...

Generally speaking if you want to contribute you have two options: Become a blockchain peer The Bitcoin network requires the full chain to be available for download. If not enough peers allow the full chain to be downloaded, this is a risk to the network. This isn't CPU intensive but ...

Because bitcoin is a pseudonymous digital currency, there are no hard statistics available. Because one popular service, SatoshiDICE, uses static Bitcoin addresses as the wagering mechanism for the players of its online "Dice" game, the amount of activity related to them can be measur...

I am trying to study the locktime feature of transactions ( https://en.bitcoin.it/wiki/Protocol_specification#tx ). I have created some raw transactions in the testnet with different locktimes, but, when I send them, they are confirmed as usual. I have also been able to spend the just...

I'm interested in seeing the schema (layout and indexes) that is used in the reference client. Namely wallet.dat, the bk** files and also the in-memory uncommitted tx. Does this exist anywhere for the 7.x client or the newer BerkleyDB format? I'd like to see what, if any changes are b...

http://www.mediafire.com/?l8i99fbyn41n97a I have an i7 getting 40 k/Hash which is not too bad Considering that with cgminer config correctly you will get an k/Hash result similar to the M/Hash result for your GPU mining activities Check this out for an complete guide of what your outp...

The problem was that in case a duplicate transaction was created in a side-chain that is afterwards reverted, and is only seen by a certain portion of the network, a fork risk exists. The nodes A that have seen the duplicate transactions and its reversal, will consider the original tr...

Is there a solid “Bitcoin Bank” yet? What would a country adopting Bitcoins as official currency have to reinvent? Are there any bitcoin banks (online services) and what are the benefits and pitfalls of using them? How can one download the bitcoin client securely? How would interest a...

Put up an ad on LocalBitcoins.com . You possibly might find a tourist arriving with bitcoins who is looking for Argentine pesos. Or perhaps you'll find a local Bitcoin miner who is simply looking to cash out some bitcoins for your pesos. Are there any goods that you could pay for with...

When miners invest in mining hardware, they get a device that generates hashes at a rate of X, essentially forever. What they will get from it is X times the integral from now to infinity of a*B*P/D, where P is the value of a bitcoin, D is the difficulty, B is the block reward and a i...

GDP (and most other stats you would think to use for this) can't be accurately determined by the network without trusting someone. The network can only see the movement of BTC; it has no information about non-BTC currencies, goods, or services. For GDP, some centralized organization w...

Important parts in bold, for those who don't want to read the detail! I've received lots of tiny transactions, in amounts sometimes as low as 0.000003BTC. Even though I've also received (relatively) larger amounts, I'm worried that when I want to spend my bitcoins the transaction fees...

How anonymous are Bitcoin transactions? How many bitcoins will there eventually be? How did transaction fees work in the version 0.3.24? Are there any feasible methods of maliciously reversing transactions? Is there a way to undo transactions with a “too low” fee? How would I hand cod...

This seems like a really basic question, but I'm having trouble searching for answers on it. My understanding is that my bitcoin client (Bitcoin v0.7.1-beta) has basically theoretically downloaded the entire transaction history of every bitcoin transaction that has ever occurred. I ca...

How can one embed custom data in block headers? Is the timestamp in the genesis block relevant? How is block-solution-withholding a threat to mining pools? What are the advantages/disadvantages of a continuously decreasing block reward compared to the current method? Bitcoin Block Siz...

For privacy, Bitcoin relies on "pseudonymity", which means that the only way people can choose not to disclose their identity, is by making it hard to link addresses to people/businesses/.... Publishing an address publicly obviously makes you give up that privacy, but that's not a pro...

I'm working on a project involving mining Bitcoins for charity. I'm writing my own miner, and though I may eventually set up my own pool for this purpose, for now I'm planning on using existing pools. My question is: how can I set up the miner so that people can use it to mine toward ...

I found that in my university there are some FPGA's available to test and to play with. I am a software/web programmer and I have never been working with verilog or whatever is used to program FPGA. So is there a nice tutorial which explains how to start mining using FPGA. I do not wa...

The average user normally doesn’t want to host a 3+GB file on his machine and wait for hours for it to download. What are the security risks of running a lightweight client? And how does this affect my daily transactions? What features does a “full” client offer a “lightweight” does not?

As PayPal is not a bank and reserves the right to freeze your account for whatever reason they deem fits them, you should never use PayPal, unless you can afford to lose your money, or are prepared to take them to court and win, should they steal your funds. While this is not specific...

Bitcoin transaction has three important parts: from address A to address B amount of bitcoins If Bitcoin client broadcasts correctly formed transaction then the network knows that certain amount of bitcoins were sent from address A to address B. If the owner of address B wants to send...